File holder



w. M. HOWSER 1,839,391

FILE HOLDER Jan 5, 1932.

Filed Feb. 1, 1929 Z3\ 1 m 2 I 1 m I 20 2] Z2 28 g I if 7 26 k 6 9 /2 H2 D HZ I 220 BY? 9- I y AT RNEYJI Patented Jan. 5, 1932 UNITED STATES, PATENT m v,

HALTER M. :I-IOWSER, OF INDIANAPOLIS, INDIANA FILE HOLDER Application filed'February 1, 1929. Serial No. 336,824.

the supporting stem and yieldingly mounted thimble arrangement incorporated in the construction for universal mounting- Another feature of'the inventionconsists 515 in detachably mounting a plurallty ofv cylindrical files so that each cylindrical surface may be progressively presented to the glazed seat when a previously exposed portion of the surface has become dulled inuse thereby permittingfull cylindrical peripheral contact, element by element prior to the necessity of replacing one filewith a new one.

Another feature of the invention consists in adjustablymounting the file holdersso that a universal tool is thereby provided.

Another feature of the invention consists in the'preferred form of. file whichis not only short and cylindrical in general appearance but is provided with 'reversely directed cutting elements. v

The full nature of the invention will be more fully understood from the accompanying drawingsand the following description and claims:

In the drawings Fig. 1 is a top plan view ofthe preferred form of the invention. Fig. 2

is a side elevational view of the invention showing the same mounted upon a portion of an engine including a valve seat. Fig. 3'is a bottom plan view of the invention taken on line 3-3 of Fig. 2 and in'the direction ofthe arrows. Fig. 4 is a bottom plan view of a modified formof the invention. Fig. 5 is a side elevational view of the'modified form r shown in Fig. 4. :Fig. 6 is an enlarged elevational view ofthe single out cylindrical file. Fig. 7 is a similar view of a double cut file.

In Figs. 1' to 3 of the drawings 110 indi-' cates a portion of the engine including the chorageportion 2 1 but alsoa :pair ofpeinvalve port 111, the seat 112 and the guide 113, said guide including the opening 114.

The opening, port andthe seat are all axially I aligned. Due to the high temperatures, the

use of hydro-carbon fuels and the continued pounding of the poppet valve upon the seat a hard scale forms on the seat which is very resistant-to removal. This scale very rapidly dulls any tool that is presented to it.

Therefore, the presentinvention contemplates providing a scale breaker to be employed forbreaking'the scale orremoving 'itfrom the valve seat preliminary to applying'the valve seating tool thereto so that customary dulling of'the tool by the glaze is eliminated. I v The glaze breaker includes a supporting stem 10 at its lower end provided with an annular groove 11 which receives the split,

sleeve retaining ring 12 that retains the sleeve 13 thereon. The sleeve 13 has a tapered or frusto-conical.exterior 14 so that it will seat the stem 10in the valveguide opening 1 1. The sleeve at its widest end as at 13 is provided with an enlarged recess 15 that terminate'sin a shoulder 16. Bearing on said shoulder and mounted within saidrecess, projecting beyond the same and concentric with the stem, is a coil spring 17. 'Said spring bears. atits oppositeend upon a plate. The stem is also secured tosaid head plate 18.

Thehead upon its opposite face and in axial alignment with said stem is provided with a tool engageable portion 19, herein shown heztragonal, in form similar .to a hexagon nu I Extending downwardly from said plate 18 are a plurality o'f'ears' 20." These ears are preferably aranged in spaced relation relative ,to each other. Each ear is provided with a transverse opening 21 which is threaded; and receives a screw .b'olt having the boltportion 22 and the head portion-23.

The headiportion 23 clamps a file supporting clamp havingthe anchora'gejportiohQl tothe ear 20 and in adjusted position. An'anti- ,frict 1'on washer 25 maybe-interposed between-the ear and'the file clamp desired orgrequired." v r The file clamp :includes not fonly'the an,-

bracing side wall portions 26 which are connected together and form therebetween a partial cylindrical passage 27 that is open along substantially its entire length for a considerable number of degrees. The file receiving passage exceeds 180 degrees in cylindrical arrangement, although the file exposing opening is considerably less, so that transverse displacement from said passage of a cylindrical file 28 therein will not occur and a considerable portion of said file 28 will be exposed through the gap or opening in said cylindrical passage. This is shown most clearly in Fig. 2 and also in Fig. 3. In orderto prevent the cylindrical file 28 from rotating a locking member in the form of a set screw 29 is provided.

Each file holder or clamp is first provided with a cylindrical file member and the same is secured therein such that an active cylindrical file element is presented for filing and through the opening in the cylindrical passage of the clamp. All of the file clamps are 'arcuately adjusted to the desired angularity relative to the stem 10. Following this the stem 10 is inserted in the valve guide opening 114, the spring 17 compressed until all the files seat or engage the valve seat. Thereupon the glaze breaker may be rotated with a ratchet type socket wrench or an ordinary brace type socket wrench until the glaze is broken. After this is accomplished the device is removed and the usual valve seat reamer may be applied for truing the seat.

Figures 4 and 5 illustrate a modified form of the invention. The stem, sleeve, locking .ring and spring together with the tool engageable portion all bear the same designat ing numerals in said figures. The head, however, is indicated by the numeral 118 and in this form of the invention the device is not shown as adjustable in the sense that the device can be accommodated to any angularity of valve seat. In this form of the invention the head 118 includes a tapered extension 120 and extending from said head and through said tapered extension is a groove 127 that receives a cylindrical file 28. The depth of the groove is such that a portion of a cylindrical element of the file projects beyond the conical surface of the head.

A" lateral extension of the groove 12? is provided at 123 and the opposite ends form a stop 124 at one end, the tapered end, and another stop 125 at the other end and in the head portion 118. A file retainer 126 having a suitable conformation so as to be receivable by the lateral extension 123 of the file re ceiving recess 127 includes an opening not shown and a screw 129 passes through said opening and screws into the head portion for anchoring the file clamp in file clamping position'. The file clamp member 126 has an arcuate or cylindrical surface 126a that embraces or bears against the cylindrical file.

In this form of the invention screw bolt 129 simultaneously serves to anchor the file clamp to the head and to anchor the file in adjusted position. However this embodiment of the invention does not provide for adjustability to the extent of the device being adapted to break the glaze on valve seats having different angularities. It will be apparent that in both forms of the invention, the device, in View of the tapered sleeve, can be readily received by substantially any standard guide opening and universally supported therein. In view of the angular positioning of the rotary files and the elemental presentation of a file surface a considerable variation in the diameter of valve seats to be operated upon can be accommodated by either form. The first form is adapted to any angularity of valve seat.

In Figs. 6 and 7 there are illustrated files which are relatively short and cylindrical in outline. Each differs from standard files in that the direction of the spiral cutting edge is counter to the usual cutting. This is most desirable because most operators are right handed and rotation is clockwise. To produce most eificientresults the cuttings must oppose that direction, hence the counter clockwise file cutting. Fig. 7 illustrates a modified form of the file shown in Fig. 6 in that a multiple thread is provided. These intersect the counter clockwise thread, however, being of greater depth for greater cutting capacity; The other thread is provided to prevent loading of the first cutting.

The invention claimed is:

1. A unitary device of the character described including a head, a stem extending from said head, a sleeve slidably mounted thereon, a coil spring encircling the stem and interposed between the head and sleeve for normally positioning said sleeve near the free end of said stein, said free end having an annular groove, a locking ring seatable in the stem groove for preventing sleeve and stem separation, and a plurality of files detachably carried by the head. ,2. In a device of the class described, a head, a stem of uniform diameter throughout its length projecting from said head, a ring at the outer end of said stem, a substantially conical sleeve slidable upon said stem and having its reduced end disposed toward the free end of the latter, a spring interposed between said head and said sleeve to normally maintain the latter against said ring, and a plurality of cutting tools carried by said head.

In witness whereof,'I have hereunto affixed my signature.

WALTER M. HOWSER- 

